London Mayor Sadiq Khan ripped into President Donald Trump on Thursday for retweeting anti-Muslim videos from a “vile, extremist group,” adding that as a result, the president should not be welcomed in the U.K.

“It's increasingly clear that any official visit from President Trump to Britain would not be welcomed,” Khan, who is Muslim, said in a statement.

Trump has faced widespread criticism after he retweeted — to his over 40 million followers — multiple graphic videos that allegedly show Muslims carrying out violent acts. The videos were first shared by the far-right Britain First organization's Jayda Fransen.

President Trump has used Twitter to promote a vile, extremist group that exists solely to sow division and hatred in our country. It's increasingly clear that any official visit from President Trump to Britain would not be welcomed. pic.twitter.com/oZ1Kt0JCfY

Prime Minister Theresa May called Trump's actions “wrong” in a statement, while Labour Party leader Jeremy Corbyn said it was “abhorrent, dangerous and a threat to our society.”

After Trump pushed back against May's criticism, saying she should “focus on the destructive Radical Islamic Terrorism” in the U.K., the prime minister said Britain is not afraid to push back on the U.S.

.@Theresa_May, don’t focus on me, focus on the destructive Radical Islamic Terrorism that is taking place within the United Kingdom. We are doing just fine!

“The fact that we work together does not mean that we're afraid to say when we think the United States has got it wrong, and to be very clear with them. And I'm very clear that retweeting from Britain First was the wrong thing to do,” May said.

The White House defended Trump's tweets amid mounting outrage, claiming that it didn't necessarily matter whether or not the violent videos were real because “the threat is real.”